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Rolling shutter is a detail of the way most modern cameras work. Essentially, the image generated does not correspond to any particular instant in time. The top and bottom of the image reflect different instants in time. In short, that's a terrible idea that can result in terrible images, but there's little to do about it (to correct a common misconception, shorter shutter times do not help!). This problem affects all cameras except those with a global shutter, and is why global shutters are important. (Older CCD cameras are not affected, but virtually all new cameras are CMOS and are affected.)
It is possible to determine the amount of rolling shutter, correct the calibration and tracking to account for it, and even sometimes to generate images that match the rolling-shutter camera (eg with a rolling-shutter-capable renderer in Lightwave or Renderman).
For more information on this topic, see the discussion in the Rolling Shutter section of the manual and online in the Rolling Shutter section of tutorials.
NOTE : As of SynthEyes 1806 or later, SynthEyes can determine the amount of rolling shutter from "live shots" as long as they contain enough systematic motion. See the Advanced Lens Controls.
©2023 Boris FX, Inc. — UNOFFICIAL — Converted from original PDF.